Add script to install all Python modules

tools/distrib/install_all_python_modules.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+echo "It's recommended that you run this script from a virtual environment."
+
+set -e
+
+BASEDIR=$(dirname "$0")
+BASEDIR=$(realpath "$BASEDIR")/../..
+
+(cd "$BASEDIR";
+  pip install cython;
+  python setup.py install;
+  pushd tools/distrib/python/grpcio_tools;
+    ../make_grpcio_tools.py
+    GRPC_PYTHON_BUILD_WITH_CYTHON=1 pip install .
+  popd;
+  pushd src/python;
+    for PACKAGE in ./grpcio_*; do
+      pushd "${PACKAGE}";
+        python setup.py preprocess;
+        python setup.py install;
+      popd;
+    done
+  popd;
+)